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Franklin·Copenhagen, Denmark·onsite

Full-Stack Engineer

Posted 8 days ago
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Ruby on RailsReactNext.jsTypeScript

About the role

What you'll do

  • Lead architecture and build AI-native financial infrastructure including receipt matching and agentic bookkeeping.
  • Design scalable systems for multi-market expansion handling diverse payment rails and accounting standards.
  • Own architectural decisions in an Effect + Next.js stack and lead migration from Ruby on Rails.
  • Architect clean, extensible API integrations with accounting platforms and payment providers.
  • Model complex financial data schemas for multi-currency, multi-entity transactional systems.

What you should know

  • This role requires thinking in systems and architecture, not just feature delivery.
  • You will have direct influence on technical direction and own major architectural decisions.
  • Expect to work in a fast-paced, AI-driven fintech environment with complex financial domain challenges.
  • The company values radical transparency, extreme ownership, and low ego in communication and collaboration.
  • Work is primarily onsite in Copenhagen, emphasizing tight collaboration and rapid iteration.

About the company

  • Franklin is a Danish B2B fintech startup founded in 2023 with strong investor backing and rapid European expansion.
  • The company is building an AI-native platform from day one, integrating autonomous AI agents in financial operations.
  • They emphasize a flat team structure with direct access to CTO and high ownership culture.
  • Franklin focuses on cutting-edge AI tools and automation to optimize engineering workflows.
  • Located in Copenhagen, Franklin offers a collaborative in-office environment with modern tech and benefits.

Key required skills

TypeScriptNext.jsReactEffectPostgreSQLAPI designAI/LLM pipelinesRuby on Rails

Summary generated from the original posting.